21146945

素因数分解:

$5^1\times {\mathrm{29}}^2\times {\mathrm{47}}^1\times {\mathrm{107}}^1$

素因数の和:217

約数の個数: 24

約数和(自身を含む): 27091584

約数和(自身を除く): 5944639

約数列:

[1, 5, 29, 47, 107, 145, 235, 535, 841, 1363, 3103, 4205, 5029, 6815, 15515, 25145, 39527, 89987, 145841, 197635, 449935, 729205, 4229389, 21146945]

約数ペア:

[(1, 21146945), (5, 4229389), (29, 729205), (47, 449935), (107, 197635), (145, 145841), (235, 89987), (535, 39527), (841, 25145), (1363, 15515), (3103, 6815), (4205, 5029)]